Reply to "Air Cleaner Base - what does the hole do?"

4vandproudMember

it's the clean air source for the PCV system, notice the hole is on the clean side of the filter element. that hole allows clean air into the valve cover and the opposite valve cover locates the PCV valve in the filler cap. the hose from the PCV valve connects to the intake manifold.

9/2/1912:34 PM

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